/*
 * Copyright 2008,2009,2010 Daniel Freitas
 * 
 * This file is part of DMF Generic DAO.
 * 
 * DMF Generic DAO is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General
 * Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
 * later version.
 * 
 * DMF Generic DAO is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Lesser General Public License along with DMF Generic DAO. If not, see
 * <http://www.gnu.org/licenses/>.
 */
package com.googlecode.dmf.genericdao.test.classloader;

import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Enumeration;

public class OnTheFlyUrlClassLoader extends URLClassLoader {

    private URL preferredUrl;

    public OnTheFlyUrlClassLoader(final URLClassLoader urlClassLoader) {
        super(urlClassLoader.getURLs());
    }

    public void setPreferredUrl(final URL url) {
        super.addURL(url);

        preferredUrl = url;
    }

    @Override
    public URL getResource(final String name) {
        try {
            Enumeration<URL> resourcesEnumration = findResources(name);

            while (resourcesEnumration.hasMoreElements()) {
                URL resources = resourcesEnumration.nextElement();

                if (resources.toString().contains(preferredUrl.getFile())) {
                    return resources;
                }
            }
        } catch (IOException e) {
        }

        return super.getResource(name);
    }
}
